n = int(input())
A = list(map(int, input().split()))
ma = max(A)
dp = [0] * (ma + 1)

for a in A:
    if a == 1:
        ma = 1
    else:
        if dp[1] + 1 > dp[a]:
            ma = dp[1] + 1
        else:
            ma = dp[a]
    for i in range(2, int(a ** 0.5 + 1)):
        if a % i == 0:
            if dp[i] + 1 > ma:
                ma = dp[i] + 1
            elif dp[a // i] + 1 > ma:
                ma = dp[a // i] + 1
    dp[a] = ma
print(max(dp))